netdev - Re: [PATCH] bnx2x: add support for receive hashing

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Message-Id: <20100427.102038.57469310.davem@davemloft.net>
Date:	Tue, 27 Apr 2010 10:20:38 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	bmb@...enacr.com, therbert@...gle.com, netdev@...r.kernel.org,
	rick.jones2@...com
Subject: Re: [PATCH] bnx2x: add support for receive hashing

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Tue, 27 Apr 2010 19:13:59 +0200

> So we have a BIG problem :
> 
> All cpus are fighting to get the socket lock,
> and very litle progress is done.
> 
> Note this problem has nothing to do with RPS, we could have 
> it with multiqueue as well.
> 
> Oh well...

Indeed, a huge issue, in that we haven't converted the UDP hash over
to RCU yet :-)

But because of the transient bind nature of UDP there are still a bunch
of cases that won't even cure.
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